hey im goin to be uprading my intercooler on my 2g gst and i want to get an intercooler that best fits my setup, but no friggin site tells how big the cores are or intercoolers. can anyone tell me the size of the greddy, apexi, adfx, darkside,dejon,and xs. it really pisses me off that no dsite that i can find tell the sizes. plus i want to minimize trimming and cutting of the bumper.

Slowboy has sizes on their site.

I can't tell you the sizes of those cores, but I'm sure they would if you contacted them. If your really looking for the best fit look at spearco cores. They have a core that will match your flow rates, hp, and size (2-209, 18.5X7X3). I have one, love it, and if I can do it, ayone can.

Hahn racecraft has sizes, slowboy racing, victory performance, magnus motorsports, go directly to greddy's site and Apexi site they have sizes. if you buy an intercooler kit it will be a direct bolt-on but you will have to trim a little of the bumper cover. these intercoolers will hold up to 500-600hp regaurdless of setup. inlet and exit pipes are on the same side on the 2g's. if your looking @ a gsx or gst from the front the pipes will be on the left due to throttle body and turbo placement. sure bigger is better but if you are considering upgrading your radiator and fans to aftermarket koyo,flexlite,ect. then go big but if not don't worry about size just pick the one you want and like on your car.

I know for a fact ADFX has the sizes on all of their cores on their site.

Taken from their site:

ADFX Racing Crossflow 2G FMIC
This unit measures 24x10x3.5" and takes up all the opening on your 2G while allowing you to retain your fog lamps. Designed using our TIG welded tanks that have 2.5" inlet and outlet that allow you to get the shortest routing available (Pipe Kit Available Seperatley).

It's not hard if you search and look around on the sites.